Tank Utility Devices API

openapi: 3.0.3
info:
  title: Tank Utility Propane Monitor Authentication Devices API
  version: '1.0'
  description: 'The Tank Utility API returns fuel-level and telemetry data from LTE-connected propane tank monitors. Access is read-only: a caller exchanges account credentials for a short-lived bearer token (valid ~24 hours), lists the device IDs on the account, then reads each device''s latest reading (tank fuel level %, temperature, battery, and last-report time). This description was reconstructed by API Evangelist from live probing of the production host and the published community client (PyPI tank-utility) — Tank Utility does not publish an OpenAPI document. Field coverage of the device object is representative, not exhaustive.'
  contact:
    name: Tank Utility Support
    email: support@tankutility.com
    url: https://support.tankutility.com/hc/en-us
  x-apievangelist-method: derived
  x-apievangelist-source: Live probe of https://data.tankutility.com/api (2026-07) + PyPI tank-utility 1.5.0 client source (github k20e).
servers:
- url: https://data.tankutility.com/api
  description: Production
tags:
- name: Devices
  description: List and read propane tank monitor devices.
paths:
  /devices:
    get:
      operationId: getDevices
      summary: List devices
      description: Return the list of device IDs associated with the authenticated account's token.
      tags:
      - Devices
      security:
      - tokenAuth: []
      parameters:
      - $ref: '#/components/parameters/Token'
      responses:
        '200':
          description: Device IDs for the account.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DevicesResponse'
              example:
                devices:
                - 5c19xxxxxxxxxxxxxxxxxxxx
        '401':
          description: Missing or expired token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /devices/{deviceId}:
    get:
      operationId: getDevice
      summary: Get device data
      description: Return the current data for a single device, including its latest reading (tank fuel level percentage, temperature, battery state, and the time of the last report).
      tags:
      - Devices
      security:
      - tokenAuth: []
      parameters:
      - name: deviceId
        in: path
        required: true
        description: The device identifier returned by `getDevices`.
        schema:
          type: string
      - $ref: '#/components/parameters/Token'
      responses:
        '200':
          description: Device data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DeviceResponse'
        '401':
          description: Missing or expired token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Device not found for this account.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  parameters:
    Token:
      name: token
      in: query
      required: true
      description: API token from getToken (valid ~24 hours).
      schema:
        type: string
  schemas:
    Device:
      type: object
      description: A propane tank monitor and its current state.
      properties:
        name:
          type: string
          description: User-assigned device/tank name.
        address:
          type: string
          description: Service address of the tank.
        capacity:
          type: number
          description: Tank capacity in gallons.
        status:
          type: string
          description: Device connectivity/health status.
        orientation:
          type: string
          description: Tank orientation (e.g. horizontal or vertical).
        fuelType:
          type: string
          description: Fuel type monitored (propane).
        lastReading:
          $ref: '#/components/schemas/Reading'
      required:
      - name
      - lastReading
    DevicesResponse:
      type: object
      properties:
        devices:
          type: array
          description: Device IDs on the account.
          items:
            type: string
      required:
      - devices
    Error:
      type: object
      description: Error envelope returned by the API.
      properties:
        statusCode:
          type: integer
        message:
          type: string
      required:
      - message
    DeviceResponse:
      type: object
      properties:
        device:
          $ref: '#/components/schemas/Device'
      required:
      - device
    Reading:
      type: object
      description: The most recent telemetry reading from the monitor.
      properties:
        tank:
          type: number
          description: Fuel level as a percentage of capacity (0-100).
        temperature:
          type: number
          description: Ambient temperature reported by the monitor.
        time:
          type: integer
          description: Reading timestamp (epoch).
        time_iso:
          type: string
          format: date-time
          description: Reading timestamp (ISO 8601).
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic authentication using the Tank Utility account email (username) and password. Used only by getToken.
    tokenAuth:
      type: apiKey
      in: query
      name: token
      description: Short-lived API token obtained from getToken, passed as the `token` query parameter. Expires after ~24 hours.